| 1 |
We can save eenrgy. |
- A. 1- By increaisng personal vehicles.
- B. 2- By making vehicles of beavier bodies.
- C. 3- By not walking
- D. 4- By avoiding unnecessary of energy.
|
| 2 |
The process of manufacturing food in pants; |
- A. Respiration
- B. Digestion
- C. Fermentation
- D. Photosynthesis
|
| 3 |
In October 4, 1957...........launched first artifcial setellites. |
- A. America
- B. India
- C. Russia
- D. Pakistan
|
| 4 |
The charge on alpha particle is: |
|
| 5 |
The energy due to motion is called. |
- A. Potential energy
- B. Kinetic energy
- C. Nuclear energy
- D. Chemical energy
|
| 6 |
The Si unit of energy : |
- A. meter per second
- B. meter
- C. joule
- D. kilowatt hour
|
| 7 |
Two American astronauts namely Neil Armstrong and Edwin Aldrin landed on the moon by: |
- A. Apallo l
- B. Apallo ll
- C. Suptnik l
- D. Sputnik ll
|
| 8 |
The deficiency of elctrons in outermost shell of silicon atom is called. |
- A. Valent shell hole
- B. Doping
- C. Hole
- D. None of these
|
| 9 |
The examples of semi - conductors: |
- A. sodium and potassium
- B. calcium and potassium
- C. Germanium and silicon
- D. carbon and nitrogen
|
| 10 |
The principal of light on whihc the fibre optics works is. |
- A. Reflection
- B. Refraction
- C. Total internal reflection
- D. Dispersion
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